Cooling jacket and deflection unit for cooling jackets

Abstract

A cooling jacket ( 14 ) for cooling an electric motor, in particular a stator ( 23 ), wherein a first spiral line ( 16 ) for transporting a coolant is formed at least partially on the cooling jacket ( 14 ). The aim of the invention is to provide a cooling system that is optimized in terms of mounting space and ensures axially equalized cooling. This aim is achieved in that a second spiral line ( 17 ) for transporting coolant is formed at least partially, and in that based on a common spiral axis R, both spiral lines ( 16, 17 ) form an axially integrated double spiral, wherein the first spiral line ( 16 ) is an inflow line and the second spiral line ( 17 ) is a return flow line. The invention further relates to a deflection unit ( 12 ) for the return into the second line ( 17 ), which substantially prevents the static pressure from dropping.

The invention claimed is: 
     
       1. A cooling jacket for cooling an electric motor, comprising a first spiral line for transporting a coolant formed at least partially on the cooling jacket, a second spiral line for transporting the coolant at least partially formed on the cooling jacket, the two spiral lines form an axially integrated double spiral in relation to a common spiral axis (R), the first spiral line is a feed flow line and the second spiral line is a return flow line, wherein the first spiral line is connected to the second spiral line on a first axial side of the cooling jacket by a deflection unit which conducts the coolant, the deflection unit including at least one blade element for separating the coolant flow into at least two partial flows and subsequently combining the partial flows, the at least one blade element includes a plurality of blade elements arranged in a cascaded manner in a circumferential direction. 
     
     
       2. The cooling jacket as claimed in  claim 1 , wherein the first spiral line and the second spiral line are covered by a cover in a radial direction. 
     
     
       3. The cooling jacket as claimed in  claim 1 , wherein an inflow to the first spiral line and an outflow from the second spiral line are arranged on a second axial side of the cooling jacket.